∴除式=
| x3+2x2−1−(−1) |
| x |
故选B．
已知被除式是x3+2x2-1，商式是x，余式是-1，则除式是（ ） A.x2+3x-1 B.x2+2x C.x2-1 D.x2-3x+1
已知被除式是x3+2x2-1，商式是x，余式是-1，则除式是（ ）
A. x2+3x-1
B. x2+2x
C. x2-1
D. x2-3x+1
A. x2+3x-1
B. x2+2x
C. x2-1
D. x2-3x+1
数学人气：112 ℃时间：2020-04-01 12:09:45
优质解答
∵被除式是x3+2x2-1，商式是x，余式是-1，
∴除式=
=x2+2x．
故选B．
∴除式=
故选B．
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